Como mostrar todo o ip banido com o fail2ban?

Question

Quando executo este comando fail2ban-client status sshd , recebo isto:

Status for the jail: sshd
|- Filter
|  |- Currently failed: 1
|  |- Total failed:     81
|  '- File list:        /var/log/auth.log
'- Actions
   |- Currently banned: 2
   |- Total banned:     8
   '- Banned IP list:   218.65.30.61 116.31.116.7

Ele mostra apenas dois IPs na lista de IPs proibidos, em vez de 8, assim como o Total Banned diz.

Enquanto eu faço tail -f /var/log/auth.log eu tenho isso:

Mar 29 11:08:40 DBSERVER sshd[29163]: error: maximum authentication attempts exceeded for root from 218.65.30.61 port 50935 ssh2 [preauth]
Mar 29 11:08:40 DBSERVER sshd[29163]: Disconnecting: Too many authentication failures [preauth]
Mar 29 11:08:40 DBSERVER sshd[29163]: PAM 5 more authentication failures; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.65.30.61  user=root
Mar 29 11:08:40 DBSERVER sshd[29163]: PAM service(sshd) ignoring max retries; 6 > 3
Mar 29 11:08:44 DBSERVER sshd[29165]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.65.30.61  user=root
Mar 29 11:08:46 DBSERVER sshd[29165]: Failed password for root from 218.65.30.61 port 11857 ssh2
Mar 29 11:09:01 DBSERVER CRON[29172]: pam_unix(cron:session): session opened for user root by (uid=0)
Mar 29 11:09:01 DBSERVER CRON[29172]: pam_unix(cron:session): session closed for user root
Mar 29 11:10:01 DBSERVER CRON[29226]: pam_unix(cron:session): session opened for user root by (uid=0)
Mar 29 11:10:02 DBSERVER CRON[29226]: pam_unix(cron:session): session closed for user root
Mar 29 11:10:18 DBSERVER sshd[29238]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=113.122.43.185  user=root
Mar 29 11:10:20 DBSERVER sshd[29238]: Failed password for root from 113.122.43.185 port 46017 ssh2
Mar 29 11:10:33 DBSERVER sshd[29238]: message repeated 5 times: [ Failed password for root from 113.122.43.185 port 46017 ssh2]
Mar 29 11:10:33 DBSERVER sshd[29238]: error: maximum authentication attempts exceeded for root from 113.122.43.185 port 46017 ssh2 [preauth]
Mar 29 11:10:33 DBSERVER sshd[29238]: Disconnecting: Too many authentication failures [preauth]
Mar 29 11:10:33 DBSERVER sshd[29238]: PAM 5 more authentication failures; logname= uid=0 euid=0 tty=ssh ruser= rhost=113.122.43.185  user=root
Mar 29 11:10:33 DBSERVER sshd[29238]: PAM service(sshd) ignoring max retries; 6 > 3
Mar 29 11:11:36 DBSERVER sshd[29245]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=116.31.116.7  user=root
Mar 29 11:11:38 DBSERVER sshd[29245]: Failed password for root from 116.31.116.7 port 24892 ssh2
Mar 29 11:11:43 DBSERVER sshd[29245]: message repeated 2 times: [ Failed password for root from 116.31.116.7 port 24892 ssh2]
Mar 29 11:11:43 DBSERVER sshd[29245]: Received disconnect from 116.31.116.7 port 24892:11:  [preauth]
Mar 29 11:11:43 DBSERVER sshd[29245]: Disconnected from 116.31.116.7 port 24892 [preauth]
Mar 29 11:11:43 DBSERVER sshd[29245]: PAM 2 more authentication failures; logname= uid=0 euid=0 tty=ssh ruser= rhost=116.31.116.7  user=root
Mar 29 11:12:39 DBSERVER sshd[29247]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=116.31.116.7  user=root
Mar 29 11:12:41 DBSERVER sshd[29247]: Failed password for root from 116.31.116.7 port 26739 ssh2
Mar 29 11:12:45 DBSERVER sshd[29247]: message repeated 2 times: [ Failed password for root from 116.31.116.7 port 26739 ssh2]
Mar 29 11:12:45 DBSERVER sshd[29247]: Received disconnect from 116.31.116.7 port 26739:11:  [preauth]
Mar 29 11:12:45 DBSERVER sshd[29247]: Disconnected from 116.31.116.7 port 26739 [preauth]
Mar 29 11:12:45 DBSERVER sshd[29247]: PAM 2 more authentication failures; logname= uid=0 euid=0 tty=ssh ruser= rhost=116.31.116.7  user=root
Mar 29 11:13:41 DBSERVER sshd[29249]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=116.31.116.7  user=root
Mar 29 11:13:43 DBSERVER sshd[29249]: Failed password for root from 116.31.116.7 port 27040 ssh2

IP proibido ainda está tentando.

No entanto, quando eu verifico com sudo iptables -L INPUT -v -n , recebi isto:

Chain INPUT (policy ACCEPT 228 packets, 18000 bytes)
 pkts bytes target     prot opt in     out     source               destination
 6050  435K f2b-sshd   tcp  --  *      *       0.0.0.0/0            0.0.0.0/0            multiport dports 22

O que estou fazendo de errado aqui?

Como posso mostrar todas as listas de IP banidas?

Obrigado antecipadamente.

    

Answer 1

Por favor, tenha em mente que a proibição de IP do fail2ban é de natureza temporária.

A melhor maneira de ver a lista completa de IPs que foram bloqueados seria verificar o arquivo de log:

sudo zgrep 'Ban:' /var/log/fail2ban.log*

O comando a seguir também pode fornecer uma lista limpa de regras de entrada:

sudo iptables -L INPUT -v -n | less

    

Answer 2

Para ver a linha completa do iptables:

# sudo iptables -L -n | awk '$1=="REJECT" && $4!="0.0.0.0/0"'

Para ver apenas o endereço IP:

# sudo iptables -L -n | awk '$1=="REJECT" && $4!="0.0.0.0/0" {print $4}'

Você pode alterar "REJECT" por "DROP", dependendo do seu caso.

    

Answer 3

Apenas uma informação:

• "Total banido" são os IPs totais que foram banidos para aquela cadeia (e provavelmente foram desbanidos).
• "Atualmente banidos" são os únicos IPs atualmente banidos para aquela cadeia (e a lista de IP confirma isso).

Espero que ajude.

    

Answer 4

Se você quiser ver a lista de IP banido com seu tempo limite (o tempo limite expira, eles são removidos do pool banido), você pode usar:

ipset list

    

Answer 5

Isso mostrará o que está banido (REJECT) na porção Chain fail2ban-ssh do iptables.

sudo iptables -L fail2ban-ssh -v -n